World: Respiratory Viruses Weekly Report Epidemiological week: 2026-05 / Reporte semanal de Virus Respiratorios Semana epidemiológica: 2026-05 [EN/ES]

Country: World Source: Pan American Health Organization Please refer to the attached file. Regional Situation: Influenza activity in the Americas continues to decline, with a regional positivity rate of 15.5%. Influenza A(H3N2) continues to predominate among subtype samples in all subregions except